Investigators found treadmills on Grayer's property and say the equipment is used to get dogs ready to fight while they use another animal as bait in front of them.

Byrd said Grayer was using a raccoon as bait.

"There was a bit stick that you use to pry open the jaw when they get locked in. There was some chemicals," he said.

Byrd believes the chemicals are steroids used on the dogs.

All of the 20 dogs and raccoon were euthanized.

"The thing about an attack dog is they're not going to attack a human. They are bred for one thing and that is to fight another dog. So they don't necessarily make the best adoptive animal because if you've got a former dog and you're walking it, chances are it could attack another dog. That's why we never adopt them out and we have them killed," Byrd said.

Baker Police charged Grayer with possession of dogs for fighting and possession of a firearm by a felon.